In a part of our crawler development, we encountered a Bangla news site (http://www.kalerkantho.com/) which uses code points instead of unicode hex valus in their website. Although it renders banla fonts in browser, but when viewings source it only shows code points, so when downloaded by crawler we only got কકى similar.  For the indexing purpose we needed to convert them to hex values so that it renders bangla font anywhere. The process of converting is really so simple.

If you have a user account that cannot make sudo command then it because it is not in sudoers list. You must add the user to sudoers list to allow sudo command. Sudoers list is located in /etc/sudoers

So open up the file with visudo command. You must use this command to edit this

burhan@burhan-desktop:$ sudo visudo

If you want to set user permission like root user add it below

# User privilege specification
root    ALL=(ALL) ALL

It is very easy to create new user account in ubuntu using terminal. Just follow adduser and addgroup command.

Here is an example

I want to create a user named "nutch" with a new "nutch" user group. Here is how I did it.

First create the user group

burhan@burhan-desktop:/usr/share$ sudo addgroup nutch
Adding group `nutch' (GID 1002) ...
Done.

Now create the user account within the user group

PHP.INI is the php configuration file that server uses. It makes lots of settings in an web server. It may include your site base directory, include path, temporary directory, timezone and lots of different php varaibles. Most of them are set by web hosts and you cannot make any change of them unless your are the host owner. But some setting you must make to let your site run smoothly and securely. So we must override some settings by putting an php.ini file. This will allow you to override some configurations of your host.